Energy-saving excavator

ABSTRACT

An energy-saving excavator includes a slideway, a counterweight iron, a first pulley, a main arm, a main arm axle pin, a support, a parabolic-shaped tower groove, a second pulley and a transmission rope; the counterweight iron is slidably connected to a body of the excavator through the slideway, the first pulley is mounted on an upper end of the slideway, the main arm is fixed to the parabolic-shaped tower groove and is rotatably connected to the body of the excavator through the main arm axle pin, one end of the transmission rope is fixed to the counterweight iron, the transmission rope goes around the first pulley and in turn the second pulley, another end is connected to the parabolic-shaped tower groove, and the first pulley is connected to the axle pin of the main arm through the support.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims the benefit of Chinese Patent Application No. 202220251470.5 filed on Feb. 7, 2022, the contents of which are incorporated herein by reference in their entirety.

TECHNICAL FIELD

The invention relates to the technical field of excavators, in particular to an energy-saving excavator.

BACKGROUND TECHNOLOGY

An excavator is an earth-moving machine that uses a bucket to excavate materials that are higher than or lower than a bearing surface, and load them into a transport vehicle or unload them to a material-stocking field. The materials excavated by the excavator are mainly soil, coal, sediment, and pre-loose soil and rock. Judging from the development of construction machinery in recent years, the development of excavators is relatively fast, and excavators have become one of the most important construction machinery in construction.

Excavators in the prior art use the weight of a counterweight iron to pull a fan-shaped tower groove installed on the pin portion of a main arm through a support transmission rope to reduce the resistance torque of the main arm of the excavator. When the excavator excavates, the bucket needs to generate pressure on the excavation site. Since the torque generated by the counterweight iron through the fan-shaped tower groove is a constant value, with the rotation of the fan-shaped tower groove, the resistance torque changes accordingly, and the operation of the main arm cylinder is unstable, thus affecting the normal operation of the excavator.

SUMMARY OF THE INVENTION

The object of the present invention is to provide an energy-saving excavator with simple structure, reasonable design and convenient use, aiming at the defects and deficiencies of the prior art.

In order to achieve the above object, the technical scheme adopted by the present invention is: an energy-saving excavator includes a slideway, a counterweight iron, a first pulley, a main arm, an axle pin of the main arm, a support, a parabolic-shaped tower groove, a second pulley and a transmission rope; the counterweight iron is slidably connected to a body of the excavator through the slideway, the first pulley is mounted on an upper end of the slideway, the main arm is fixed to the parabolic-shaped tower groove, and is rotatably connected to the body of the excavator through the axle pin of the main arm, one end of the transmission rope is fixed to the counterweight iron, the transmission rope goes around the first pulley and in turn the second pulley, another end is connected to the parabolic-shaped tower groove, and the first pulley is connected to the axle pin of the main arm through the support.

Furthermore, two main arm cylinders are attached between the main arm and the body of the excavator.

Furthermore, a counterweight iron cylinder is connected to the counterweight iron, and the counterweight iron cylinder is connected to an oil circuit of one of the main arm cylinders.

After adopting the above-mentioned structure, the beneficial effects produced by the present invention are: a kind of energy-saving excavator described in the present invention that utilizes the weight of the excavator’s own counterweight iron, uses a transmission rope to generate an upward dynamic torque through the slideway, support, pulleys and parabolic-shaped tower groove, tends to have a constant value, and offsets a portion of the resistance torque to achieve labor-saving and energy-saving effects once and for all. The present invention has the advantages of simple structure, reasonable setting, and low production cost, etc.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a structural diagram of the present invention;

FIG. 2 is a structural diagram of a working state of the present invention; and

FIG. 3 is a structural diagram of another working state of the present invention.

Description of reference numerals: slideway 1, counterweight iron 2, first pulley 3, main arm 4, main arm axle pin 5, support 6, parabolic-shaped tower groove 7, second pulley 8, transmission rope 9, main arm cylinder 10. counterweight iron cylinder 11, bucket arm 12, bucket 13.

SPECIFIC EMBODIMENTS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not contributing creative efforts.

Referring to FIGS. 1-3 , the present embodiment adopts the following technical scheme: it includes a slideway 1, a counterweight iron 2, a first pulley 3, a main arm 4, a main arm axle pin 5, a support 6, a parabolic-shaped tower groove 7, a second pulley 8 and a transmission rope 9; the counterweight iron 2 is slidably connected to the body of the excavator through the slideway 1, the first pulley 3 is mounted on an upper end of the slideway 1, the main arm 4 is fixed to the parabolic-shaped tower groove 7, and is rotatably connected to the body of the excavator through the main arm axle pin 5, one end of the transmission rope 9 is fixed to the counterweight iron 2, the transmission rope 9 goes around the first pulley 3 and in turn the second pulley 8, another end is connected to the parabolic-shaped tower groove 7, and the first pulley 3 is connected to the main arm axle pin 5 through the support 6.

Two main arm cylinders 10 are attached between the main arm 4 and the body of the excavator.

The counterweight iron 2 is connected with a counterweight iron cylinder 11, the counterweight iron cylinder 11 is connected with an oil circuit of one of the main arm cylinders, and the cylinder is not connected with the oil circuit of the excavator operating system.

The working principle of this specific embodiment is: the lifting force of the main arm cylinder 10 is reduced by the upward pulling force of the counterweight iron 2 on the main arm 4, thereby saving energy by more than 30%; the dynamic torque is generated by multiplying the weight of the counterweight iron by the power arm, the power arm is the horizontal distance between end of the main arm axle pin 5 of the parabolic-shaped tower groove and a tangent point of the transmission rope 9. The main arm 4 of the excavator takes the main arm axle pin 5 as the center of a circle, the distance between the main arm 4, bucket arm 12, bucket 13, the center of gravity of the materials and the main arm axle pin 5 is the radius, and reciprocating motion (working state) is carried out within 50 degrees above and below the horizontal line of the axle pin. Since the parabolic-shaped tower groove and the main arm are fixed together, the tangent point between the parabolic-shaped tower groove and the transmission rope is also changing. Due to this unique design, when the resistance torque increases, the dynamic torque also increases synchronously, and when the resistance torque decreases, the dynamic torque also decreases synchronously. On the basis of the existing technology, when the height of the slideway of the counterweight iron is increased, the effective stroke of the counterweight iron is increased, and the length of the power arm is increased at the same time to obtain a greater dynamic torque, thereby reducing the load of the engine. In addition, increasing the stroke of the counterweight iron can increase the volume of the counterweight iron cylinder (with the same cylinder diameter), and at the same time, the sectional area of one of the cylinders of the main arm can be enlarged. Since the system’s pressure in this specific embodiment is kept at a constant value all the time, the lifting force of the cylinder is increased, thereby reducing the load of the engine.

This specific embodiment utilizes the weight of the excavator’s own counterweight iron to generate an upward dynamic torque with a transmission rope through the slideway, support, pulleys, and parabolic-shaped tower groove, tends to have a constant value, offsets a portion of the resistance torque (weight of the main arm, bucket arm, bucket, materials and the working cylinders multiplied by the distance between its center of gravity and the main arm axle pin) to achieve labor-saving and energy-saving effects once and for all, the upward moment generated by the counterweight iron according to this specific embodiment is always unchanged, and the operation of the main arm cylinder is more labor-saving.

The basic principles and main features of the present invention as well as the advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification only illustrate the principle of the present invention, the present invention will have other variations and improvements without departing from the spirit and scope of the present invention, and those variations and improvements all fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents. 

What is claimed is:
 1. An energy-saving excavator, comprising: a slideway, a counterweight iron, a first pulley, a main arm, an axle pin of the main arm, a support, a parabolic-shaped tower groove, a second pulley and a transmission rope; wherein the counterweight iron is slidably connected to a body of the excavator through the slideway, the first pulley is mounted on an upper end of the slideway, the main arm is fixed to the parabolic-shaped tower groove and is rotatably connected to the body of the excavator through the axle pin of the main arm, one end of the transmission rope is fixed to the counterweight iron, the transmission rope goes around the first pulley and in turn the second pulley, another end is connected to the parabolic-shaped tower groove, and the first pulley is connected to the axle pin of the main arm through the support.
 2. The energy-saving excavator according to claim 1, wherein two main arm cylinders are attached between the main arm and the body of the excavator.
 3. The energy-saving excavator according to claim 2, wherein a counterweight iron cylinder is connected to the counterweight iron, and the counterweight iron cylinder is connected to an oil circuit of one of the main arm cylinders. 